A Use for Hitherto Useless Materi An ingenious example of the em-"ployment of waste products which, through efficiency and an inventive turn of mind are made usable again, present inthe workshop of George "Guriahoff, at 801 Rue Ratard, where several hitherto use-ess by-products have been commercialized through the ability of this young Russian chemist, Principally is Mr. Gurianoff interested in experimenting with the only too familiar hypo solution "known to everyone interested in "photography as being useless once it has served its purpose in the development of films.
Mr. Gurianoff has built up a well paying business through purchasing the exhausted solution after it has deen used and is about to be thrown away, and through several chemical formulas developed by himself, is extracting from it, silver, sulphur and Glauber's salt which is used by all glass makers, "Very Little Left Over 'The used hypo solution is pur ehased_in whatever volume obtainable and with it are mixed certain chemicals which produce a pre cipitate of a heavy silver content. "This is then heated, dried, and put through several chemical' pro-esses from which, the silver emerges in an absolutely pure state, much so that when " is sold to the refiners it brings a higher price than the usual silver used in trade, The sulphur fs obtained through several drying out processes after being mixed with chemicals of Mr. Gurfanof's invention and the third product obtained from the hypo solution, Glauber's salt, is produced after a'process very similar to the sulphur production, Mr. Gurianoff has carried his experiments even farther and fol-Jowing along the same line of rea soning that resulted in the hypo development, he has secured photo. graphic film, cinema film, and has Become a large purchaser of photographic plates from all of which ho obtains the three products mentioned above, But in this connection enters an interesting side line for the silver after being refined is put through certain other chemical processes ana 48 used on the very glass from which it was obtained, photographic plates, and is made into very serviceable mirrors, As the glass used in these plates is of an eapeciaily high quality, the second use is entirely teasable.
{An Unshatterable Glass Mr, Gurianoff has done consider. able "further experimenting with das making and has brought out what he claims is a none shatterable glass that cannot be penetrated by pistol and rifle fire. The glass is made by a special process of his own invention and being a protection against gun fire is as clear 48 ordinary window glees. The Shventor believes that this in-Yontion has large possiouuies ana alrendy he has been approached by Manufacturers interested in making it in marketable quantities.
Mr. Gurianoff has resided in Shanghai for some time and came here after the Russian débicle, He obtained his. training "in chemistry at the Riga Institute but the revolution interrupted his studies and he saw. considerable service in.the anti-revolutionary armies.
As a young man he became a protege: of an Englishman, Mr. Perey, R. Clark, an official of the Baku Wire Rope. Cable Ca. Ltd., who took.a great interest in him but. with whom he has not been in communication since 1918, Mr.
Clark recognised his latent abilities in chemistry and made it possible for him to pursue. a youthful hobby. He is especially anxious to get in touch with his old boyhood friend and would appreciate his present address.
Text read from the printed page and cleaned; old type leaves the occasional error.